JP4886795B2 - Filling system for filling substances into containers - Google Patents

Description

  The present invention relates to a filling system for filling a container with a substance. The invention further relates to a method of operating such a filling system.

  Filling a container with one or more substances is a common task, for example, packaging a substance for shipping or storage purposes. In the field of filling containers with gases such as liquefied petroleum gas, also known as LPG, filled turntables and carousels are often used. The containers are transported and transferred to a turntable or carousel where the containers are received by the filling unit and each is continuously weighed on an electronic weigh scale. These weigh scales are connected to a control system that controls the filling of the container in response to a signal from the weigh scale that is proportional to the amount of material filled in the container. This type of filling is used to fill several hundreds or thousands of containers per hour with LPG. In order to obtain such a high filling capacity, the turntable or carousel has a large number, usually at least a dozen filling units, each with a weighing instrument that is included to fill a large number of containers at a time. I have. It is also carried out in one cycle that the containers are received at the first position and filled during the turntable or carousel rotation, and the filled containers are transported to the second position where they are unloaded. The Although this known method of filling a container works very well, it requires a large number of weigh scales and corresponding control devices. This type of system is known, for example, from WO99939130A2.

  One object of the present invention is to provide a filling system with a small number of weigh scales and a corresponding method of operating such a system. Another object is to provide a system having a capacity at least equal to known types of filling systems and a method of operating the system to obtain such capacity. Other objects will become apparent from the description, the claims and the enclosed figures.

The first aspect of the present invention is:
A plurality of transport units each arranged to receive and transport at least one container;
A substance dispensing system comprising filling means arranged with respect to the conveying unit for filling the at least one container with the substance while the at least one container is being conveyed by the conveying unit;
Drive means arranged to move the transport unit;
A track in which the transport unit is moved along a track by the drive means, the track being provided to support the transport unit while being moved;
A control system for controlling the operation of the filling system;
An electronic weigh scale incorporated in each of at least two separate substantially horizontal sections of the track, the sections being adapted to provide discrete weighing sections distributed in the track The weighing unit is arranged to individually weigh the conveying unit, including any existing containers and materials, while the conveying unit is moved by the drive means and passes through the weighing unit. And the operation of the filling system includes at least one electronic weighing meter including operations relating to weighing information obtained from the weighing section;
Including a filling system.

  The weighing information obtained while passing through the weighing compartment provides enough information to predict within a tolerance when a predetermined amount of material has been filled into the container. Thus, the filling system according to the present invention may include only two weighing scales, i.e. one weighing scale in each of at least two weighing sections, even though there may be any number of transport units. This is significantly less than known systems with one weigher for each transport unit, and therefore with systems having twelve transport units, usually with at least 12 weighers. The filling system according to the invention can comprise any number from 6 to 36, such as 6, 12, 36, or any other number between the above, or a larger number of transport units, 2 Can operate using only one weigh scale. Additional scales may be used to improve accuracy, perform further actions, check the scale, and so on.

  These weigh scales are incorporated into separate weighing sections of the track, which are arranged at a distance in the direction of the track. These weighing compartments are arranged to individually weigh the transport unit, including any existing containers and materials while the transport unit is passing through the weighing compartment. Thereby, information regarding the amount of substance filled at at least two points in the filling sequence can be obtained. This weighing information forms the basis for operating the filling system to allow the calculation of the total filling time required to properly fill the container and thus to properly operate the filling means. The features of the filling system according to the invention can be realized in a carousel or turntable system, whereby the filling capacity, ie the number of containers that can be filled per unit time, corresponds to the capacity of the known system. obtain.

  The track can be circular and the filling system can be realized as a carousel, or this is the length that the transport unit can be transported in the loop and the filling can take place in the majority of this loop. It may be circular or polygonal. Alternatively, the portion of the track on which filling is performed can be any shape. This can also include a straight section where the container is transported in only one linear direction. The track can be raised, for example, to an overhead position where the transport unit is suspended from the track. The transport unit and the filling means can also be integrated. This may include embodiments in which the container engages the transport unit / filling means only at the filling opening of the container, such as the bottleneck, and is transported in this manner at least during the filling operation.

  A preferred embodiment of the filling system includes placing at least two weighing sections at a location downstream of the location of the track where filling is initiated and upstream of the location at which filling is complete. The term “downstream” refers to a position located in the direction in which the transport unit is moved, and the term “upstream” refers to a position located in a direction opposite to the direction in which the transport unit is moved. A first weighing section located after the position of the trajectory at which filling is initiated can provide a first indication of the amount to be filled in the container, this amount being used to calculate the filling rate, i.e. It can be used to calculate the amount of material that is filled per unit time. This filling rate can then be used to calculate the filling time to reach the first predetermined filling level. The second weighing section placed before the position where the filling is completed is for example to check whether a first predetermined level has been obtained and / or from the first calculated filling speed. In order to calculate the filling rate again based on a long period of time, a second indication of the amount filled in the container may be given. A second indication of the amount filled can also be used to calculate the remaining amount to be filled into the container as well as the remaining filling time for a full filling operation.

  Another preferred embodiment of the system comprises a position downstream of the position of the track where the filled containers are unloaded from the transport unit and a position upstream of the position where the containers to be filled are received by the transport unit. Including at least one weighing section. Such a weighing section can be used to obtain the tare weight of the transport unit. Otherwise, any spilled material or other generally undesirable material that is randomly present on the transport unit will compromise the accuracy of the filling operation. For example, this may result in filling the container with less material than intended.

  A further preferred embodiment of the system is that at least one weighing section is arranged downstream of the position of the track where the container to be filled is received by the transport unit and upstream of the position where filling is to be started. Including that. Such a weighing section can be used to obtain the tare weight of the transport unit including the container.

  A still further preferred embodiment of the filling system has at least one weighing section located downstream of the position of the track where the filling is completed and upstream of the position where the filled container is unloaded from the transport unit. Indicates that Such a weighing compartment can be used to inspect the weight of the transport unit, the container and the material filled in the container. When the tare weight between the transport unit and the container is known, this means that the container is actually filled, for example so that the filled quantity can be checked for the desired quantity, acceptable spacing, maximum quantity, minimum quantity etc. Provide information on the amount of substances

  Another preferred embodiment of the present filling system includes the arrangement of at least one wheel or roller between each transport unit and the track to provide a movable support for the transport unit. Alternatively, at least one sliding shoe may be arranged in a similar manner. This provides a suitable direct contact with the transport unit via wheels, rollers or sliding shoes on the track and thus also on the weighing compartment integrated in the track. One wheel is preferred because it provides the opportunity to weigh transport units etc. over the entire length of the weighing section and thus provides the maximum time to perform the weighing operation. This is because there can be only one transport unit in the weighing compartment at a time to carry out individual weighings, so that the length of the weighing compartment is larger than the width of the transport unit, here the wheels of two adjacent transport units This is advantageous because it must be less than the distance between the centers. This significantly increases the capacity of the filling system since the transport unit can be moved quickly and the weighing operation is performed with sufficient accuracy.

  A further preferred embodiment of the filling system comprises that the track is made from a rail or a section made from a rail-like metal profile. Rails and metal profiles provide a robust and durable structure at a reasonable cost.

  A further preferred embodiment of the filling system is each transport unit having at least two support arms hinged to the transport unit at one end and hinged to the central part of the drive means at the opposite end. , Each transport unit, a pair of two arms and the central portion include each transport unit arranged to structurally form a parallelogram supporting the transport unit. Two support arms that are hinged to the transport unit and arranged in combination with other parts to form a parallelogram indicate that the container holder of the transport unit is horizontal when the transport unit is installed Despite any minor changes in the track, such as a slight deviation from the common horizontal plane, the transport unit is always kept horizontal. If the container holding part of the transport unit is not horizontal, the load from the container is introduced into the support arm so that the full load is not transmitted to the weighing compartment. This is avoided by the parallelogram and the weighing accuracy is maintained.

  The filling system according to the invention can be used for any substance, for example powder, gas, fluid or liquid, or a combination of such substances, or it can be a granule or a plurality of pieces of different sizes. It can also be a large piece, for example a vegetable such as carrot or potato. A preferred use of this system is for filling containers with liquefied gas, in particular liquefied petroleum gas (LPG).

  Some or all of the above embodiments of the filling system according to the invention can be combined and included in one filling system.

Another aspect of the invention relates to a method of operating a filling system for filling a container with a substance, the operation of this filling system for filling a container comprising the following steps.
a) causing the transport unit to receive the container b) starting filling the container with the substance and registering the start time of filling c) continuing the filling for a predetermined time t1 d) transporting unit Weighing the total mass of the transport unit, the container and the substance filled in the container while the is passing through the first weighing section of the track e) From the total mass obtained in step d), the transport unit and the container Calculating the amount A1 of the substance filled during time t1 by subtracting the predetermined mass of step f) calculating the filling rate during time t1 g) first predetermined Step h) to calculate the remaining filling time t2 to reach the filling amount A2 based on the calculated filling rate during time t1, step i to continue filling at the calculated time t2 Step j) Weighing the total mass of the transport unit, the container and the material filled in the container while the transport unit is passing through the second weighing section of the track. The transport unit is derived from the total mass obtained in step i). Calculating the amount A2 of material filled during time t2 by subtracting a predetermined mass between the container and the amount of previously filled material A1 k) filling rate during time t2 Step l) calculating the remaining filling time t3 to reach the second predetermined filling amount A3 based on the calculated filling rate during time t2 m) the calculated time t3 Step to continue filling in

  This method allows the filling system to operate based on input from only two weigh scales. The container is filled with too much or too little material by first operating the filling to reach the first predetermined amount and then the filling to reach the second predetermined amount. Risk is reduced. That is, high accuracy in filling is obtained despite only two weighing meters being used. Filling may continue or be interrupted while weighing is performed, ie there may be a delay between times t2 and t1 and between t3 and t2, and not Sometimes.

Further operations of the filling system include steps a) to m) followed by the following steps:
n) Weighing the total mass of the transport unit, the container and the material filled in the container while the transport unit is passing through the further weighing section N of the track, step o) the preceding time t ( From the total mass obtained in step n), the predetermined mass with the preceding amount A (N-2) of the substance filled in the container at time t (N-2) prior to N-1). Calculating the amount of substance A (N-1) filled during the preceding time t (N-1) by subtracting p) the filling rate during the preceding time t (N-1). Step q) The remaining filling time t (N) to reach a further predetermined filling amount A (N) is set to the filling rate calculated during the preceding time t (N-1). Step r) based on the calculated remaining time t (N) Repeating steps n) ~r) until the final volume is obtained when step s) the filling amount to continue filling is less than the final a predetermined amount

  By using a further weighing section, meaning that more than two weighing meters are used, it is possible to obtain a higher accuracy of filling. By using more weigh scales, the filling process can be divided into a number of sequences that are used to successively reach a filling volume where each sequence is progressively larger. In this way the filling can be carried out gradually in order to reach the final quantity with very high accuracy.

A preferred operation of the filling system includes steps a) to k) or steps n) to s) followed by the following steps:
A step of weighing the total mass of the transport unit, the container and the filled material while the transport unit is passing through the weighing section of the track; a predetermined tare mass of the transport unit and the container from the total mass Calculating the total amount of substance present in the container by subtraction

  The total amount thus filled can be found and then compared to a predetermined minimum amount, maximum amount, etc.

  Another preferred operation of the filling system is that the ratio of the predetermined quantities A2 and A3 defined as (A3-A2) / A3 is less than 0.25, preferably less than 0.1. And more preferably between 0.001 and 0.1. In this way, the first predetermined amount A2 is very close to the second predetermined amount A3, so that the filling until the amount A2 is reached is full. Reaching A2 can bring the filling closer to the desired final quantity, and a small full quantity is calculated and filled to provide an accurate way to reach the desired final quantity.

  A further preferred operation of the filling system includes the preceding step of weighing the transport unit to obtain the tare mass of the transport unit while it is passing through the weighing section of the track. This allows any spilled material that is randomly present on the transport unit and other generally undesirable materials to be corrected in the present filling operation.

A still further preferred operation of the filling system includes the following intermediate steps between step a) and step b).
A step of weighing the total mass of the transport unit and the container received while the transport unit is passing the weighing section of the track, and a predetermined tare mass of the transport unit and the container is subtracted from the total mass. Calculating the potential amount of residual material present in the container by

  This allows the filling to be corrected by calculated residual material that is often present when refilling the container with respect to LPG or other gases. This residual material can be of acceptable quality.

  The present invention is described in more detail below with reference to the accompanying figures. These figures display examples of embodiments of the present invention and are included solely for informational purposes.

  FIG. 1 shows the elements of a filling system for filling a container 1 with a substance. Containers 1 are transported to position 9 by conveyor 14, where containers 1 to be filled are received by a plurality of transport units 2, each arranged to receive and transport at least one container. The filling of the substance is carried out while the transport unit 2 is moved in the direction R indicated by the arrow towards the position 8 where the filled containers 1 are unloaded onto the conveyor 14. A substance distribution system comprising a filling means 3 is arranged with respect to the conveying unit 2 for filling the container 1 with the substance while being conveyed by the conveying unit 2 (see FIGS. 2 and 3). Referring again to FIG. 1, the drive means 4 is arranged to provide movement of the transport unit 2, here rotation, and is shown here as a central portion 12 arranged at the center of rotation. The drive means 4, 12 are connected to the transport unit by a support arm 11. As FIG. 1 shows the system from above, a substantially horizontal circular track 5 which is moved along the track while the transport unit 2 is driven by the drive means 4 is only visible between the transport units in FIG. It is. The track 5 is provided to support the transport unit. Further details of the track 5 are shown in other figures. A control system for controlling the operation of the filling system is not shown. Specific details regarding the substance distribution system, for example LPG gas filling, filling means, control system and drive means are well known to those skilled in the art. However, the present invention can also be used for other applications.

  2 and 3 show the container 1 supported by the container holding part of the transport unit 2 and the filling means 3 provided for filling the container 1 with the substance. The weight of the transport unit 2, the container 1, the filling means 3 and any substances present is supported mainly by the support 10 and directly on the track 5 and from there on the electronic weighing scale 6 (see FIGS. 4, 5). A wheel is arranged between the transport unit 2 and the track 5 to provide a movable support 10 for the transport unit. More than one wheel or sliding shoe or roller or any other similar means can be used as the movable support 10. FIG. 2 shows that two support arms 11 are hinged to the transport unit 2 at one end by a hinge 15 and hinged to the central part 12 of the drive means at the opposite end, so It is shown that the two arms 11 and the central portion 12 form a parallelogram that supports the transport unit 2.

  4 and 5 display a filling system without the transport unit 2 and the filling means 3 to show information about the electronic weighing scale 6 and the weighing section 7 of the track 5. Container 1 is transported to the filling site by conveyor 14 and enters from position 9 and exits position 8. The electronic weighing scale 6 is integrated in FIG. 4 into two separate sections of the track in order to provide separate weighing sections 7 a, 7 b distributed along the track 5. Each electronic weigher 6 preferably includes one or more weighing cells 16 depending on the size and dimensions of the weighing compartment. The weighing sections 7a, 7b individually weigh the transport unit 2 including any existing containers and materials while the transport unit 2 is moving by the drive means 4, 12 while passing through the weighing sections 7a, 7b. Are arranged as follows. The operation of this filling system includes an operation relating to weighing information obtained from the weighing sections 7a, 7b. The transport unit first starts with the first weighing section 7a, in which the weight of the transport unit is determined individually, including any existing containers and materials, while the transport unit 2 is passing through the first weighing section 7a. Will pass through. Some time later the transport unit will pass through the second weighing section 7b where another weight determination is carried out. From these two individual weighings, for example, it can be calculated how much the total weight has increased between these two weighings, thereby giving an indication for the amount of material filled between the two weighings.

  In FIG. 5, the system includes five weigh scales 6 and five individual weighing sections 7 a-7 e, which are tracked to provide individual weighing sections distributed along track 5. Built in 5 separate compartments. The system displayed in FIG. 5 is preferably adapted to fill a reusable gas bottle with LPG gas. Each electronic weigher 6 preferably includes one or more electronic weighing cells 16 depending on the size and dimensions of the weighing compartment. The weighing compartments 7a-7e are designed to individually weigh the transport unit 2 including any existing containers and materials while the transport unit 2 is moving by the drive means 4, 12 while passing through the weighing compartment. Has been placed. The operation of the filling system includes an operation relating to weighing information obtained from the weighing sections 7a to 7e. The transport unit 2 in position 9 receives the container 1 to be filled. Before the container 1 is received, the tare weight of the empty transport unit 2 is determined in the weighing section 7e. This takes place after the filled container has been unloaded at the outlet position 8. The transport unit 2 then passes through a weighing section 7a where the weight of the transport unit 2 and the container 1 is determined including any residual material present in the container while the transport unit 2 is passing through the section 7a. Will. At the preceding occasion, the individual tare weight of the container has been determined and that information is stored in a control system that controls the filling operation. The weight obtained in compartment 7a was stored with respect to the tare weight of container 1 and the tare weight of transport unit 2 determined in compartment 7e to also calculate the presence and amount of any residual material in container 1. Compared with information. This information is used to determine how much material is needed to fill the container to a predetermined level. Now, filling is started and the start time is registered. A little later, the transport unit 2 passes through the weighing section 7b, where the weight determination is carried out and the time elapsed since the start of filling is registered. The filling flow rate is determined from the filling time and the amount filled. This is used to estimate the filling time required to obtain the first filling level to be reached before further weighing is carried out in section 7c. Filling is started again and the start time is recorded. When the estimated filling time has elapsed, filling is stopped. The total weight is determined in compartment 7c, where the flow rate is determined with respect to the filling performed between compartments 7b and 7c. The amount of material filled up to this point is compared with a predetermined second filling level and, based on this flow rate, to determine the filling time required to reach the second filling level, A second calculation in the form of an estimate is performed. Filling is started again and the start time is recorded. When the second estimated filling time has elapsed, filling is stopped. The total weight is inspected in section 7d to verify that the amount of material present in the container is within a predetermined tolerance interval. If not within the tolerance interval, in order to obtain the correct amount of material, further preferably a short filling can be carried out further before unloading, or the container 1 is again in compartments 7e and 7a- Additional filling cycles can be provided by passing through 7d. In the latter case, the tare weight is not obtained in the section 7e because it has already been obtained in advance. The filled container 1 is unloaded at position 9 and the transport unit 2 is ready to receive a new container after its tare weight has been obtained in section 7e.

(Example 1)
In a filling system according to the invention comprising five weighing compartments, the following steps are performed to fill a gas bottle with 8,000 g (8 kg) of LPG.
-The transport unit is weighed in the first weighing section and its tare weight is 40,000 g.
A container with a known tare mass of 560 g is received by the transport unit.
-Both the transport unit and the container are weighed in the second weighing section to obtain a total mass of 40,570 g.
10 g of residual LPG is calculated (remaining amount = total mass minus tare mass of transport unit minus tare mass of container = 40,570 g-40,000 g-560 g = 10 g).
• LPG charging is started and continues for a first time of 3 seconds.
-The transport unit, container and LPG content are weighed together in the third weighing section to obtain a total mass of 42,050 g
-Currently, the amount of LPG is 42,050g-40,000g-560g = 1,490g.
The filling rate in the first time is calculated to be (1,490 g-10 g) / 3 sec = 493.3 g / sec.
The second time to reach 7,300 g of LPG is calculated as (7,300 g-1,490 g) /493.3 g / sec = 11.777 seconds, leaving 700 g for full filling. Is done.
Filling continues for a second fill time of 11.777 seconds.
-The transport unit, the container and the LPG content are weighed together in the fourth weighing section to obtain a total mass of 47,899 g.
-Currently, the amount of LPG is 47,899g-40,000g-560g = 7,339g.
The filling rate in the second time is calculated to be (7,339 g-1,490 g) /11.777 seconds = 496.6 g / second.
The third time to reach 8,000 g of LPG is calculated to be (8,000 g-7,339 g) /496.6 g / sec = 1.331 seconds.
Filling continues for a third fill time of 1.331 seconds.
-The transport unit, container and LPG content are weighed together in the fifth weighing section to obtain a total mass of 48,549 g.
• Currently, the amount of LPG is 48,549 g-40,000 g-560 g = 7,989 g, which is 11 g lower than the target net LPG weight of 8,000 g.

  It is to be understood that the invention disclosed in the above description and figures can be modified and changed and still fall within the scope of the invention as claimed above.

FIG. 2 shows a layout of a filling system according to the invention as seen from above, including means for loading and unloading containers. Arrow R indicates the direction of movement. It is a side view of a conveyance unit, a container, and a filling means. It is a front view of a conveyance unit, a container, and a filling means. FIG. 2 shows a system according to the invention with a trajectory including two weighing sections arranged between a position where filling is started and a position where filling is completed, displayed without a transport unit; is there. FIG. 5 shows a system similar to FIG. 4 where the system includes five weighing compartments.

Claims (17)

A filling system for filling the container (1) with a substance,
In a system comprising a control system for controlling the operation of the filling system,
The filling system includes:
A plurality of transport units (2) each arranged to receive and transport at least one container (1) ;
At least one container (1) is at least one container for filling material (1), arranged filling means to said conveying units (2) while being conveyed by the conveying unit (2) A substance distribution system comprising (3) ;
Drive means (4) arranged to move the transport unit (2) ;
Wherein said conveying units by a driving unit (4) (2) is an orbit (5) which is moved along the track, provided to support between said conveying unit (2) which is moved track (5) ,
An electronic weighing meter (6) incorporated in each of at least two separate substantially horizontal compartments of the track (5), the compartments being discrete weighing compartments (7) distributed in the track. And at least one electronic weigh scale (6) adapted to provide
The weighing compartment (7) is arranged to individually weigh the transport unit, including any existing containers and materials, and
While the transport unit (2) is passing by the weighing compartment (7) while being moved by the drive means (4), the weighing compartment (7) includes any existing containers and substances. Characterized in that it is of the kind arranged to individually weigh the transport unit (2), and the operation of the filling system comprises an operation on the weighing information obtained from the weighing section (7) , Filling system. The filling system according to claim 1, wherein at least two weighing sections are arranged at a position downstream of the position of the track (5) at which filling is started and at a position upstream of the position at which filling is completed. At least in a position upstream of the position of the track (5) where the filled container is unloaded from the transport unit (2) and the container to be filled is received by the transport unit (2) The filling system according to claim 1 or 2, wherein one weighing section is arranged. At least one weighing section (7) is arranged downstream of the position of the track (5) where the container to be filled is received by the transport unit (2) and upstream of the position where filling is started. A filling system according to any of the preceding claims. At least one weighing section (7) is arranged downstream of the position of the track (5) where the filling is completed and upstream of the position where the filled container is unloaded from the transport unit (2). A filling system according to any of the preceding claims. Wherein the at least one wheel or roller between the track and the conveying unit (2) (5) in order to provide the movable support (10) for the conveying units (2) are disposed, wherein the aforementioned A filling system according to any of the paragraphs. At least one sliding shoe disposed between the conveying unit to provide a movable support (10) (2) and the track (5) for the track (5) the transportation unit on (2) The filling system according to claim 1. A filling system according to any of the preceding claims, wherein the track (5) is made from a rail or a section made from a rail-like metal profile. Each transport unit (2) includes a hinged least two support arms (11) in the central portion of said driving means at the opposite end is hinged to said conveying units (2) at one end, Each of the transport units (2) , a set of two arms and the central portion (12) are arranged to structurally form a parallelogram supporting the transport unit (2) . A filling system according to any one of the above.   A filling system according to any preceding claim, wherein the substance is a powder, gas, fluid or liquid, or a combination of such substances.   The filling system according to claim 10, wherein the substance is a liquefied gas, in particular a liquefied petroleum gas (LPG). A method of operating a filling system for filling a container (1) according to any of the preceding claims, wherein the operation of the filling system for filling a container comprises:
a) having the transport unit (2) receive the container (1) ;
b) starting filling of the substance into the container (1) and registering the start time of filling;
c) continuing the filling for a predetermined time t1,
d) filling said the conveying unit (2) is the track (5) the transport unit while the first is being passed through the weighing section (7) of the (2) and the container (1) and the container (1) Weighing the total mass of said material with
e) Amount A1 of material filled during time t1 by subtracting a predetermined mass of the transport unit (2) and the container (1) from the total mass obtained in step d). A calculating step;
f) calculating the filling rate during time t1,
g) calculating a remaining filling time t2 to reach the first predetermined filling amount A2 based on the calculated filling rate during the time t1;
h) continuing the filling at the calculated time t2;
i) filling the the conveying unit (2) is the track (5) second of said conveying units while is being passed through the weighing section (7) of (2) and the container (1) and the container (1) Weighing the total mass of said material with
j) At the time t2 by subtracting the predetermined mass of the transport unit (2) , the container (1) and the quantity of previously filled substance A1 from the total mass obtained in step i). Calculating the amount A2 of the substance filled in between;
k) calculating a filling rate during time t2,
l) calculating a remaining filling time t3 to reach a second predetermined filling amount A3 based on the calculated filling rate during time t2,
m) continuing filling at the calculated time t3;
Characterized in that it comprises a method of operating a filling system. In steps a) to m)
n) wherein said conveying units (2) is filled in said conveying unit (2) said vessel (1) container (1) while that is being passed through a further weighing section N of the track (5) Weighing the total mass with the substance;
o) A preceding amount of material filled in the container (1) at time t (N-2) prior to the transport unit (2) , the container (1) and the preceding time t (N-1). The amount of material charged during the preceding time t (N-1) by subtracting the predetermined mass of A (N-2) from the total mass obtained in step n) Calculating A (N-1);
p) calculating a filling rate during said preceding time t (N-1);
q) The remaining filling time t (N) to reach a further predetermined filling amount A (N) is based on the calculated filling rate during the preceding time t (N-1). A calculating step;
r) continuing the filling for the calculated remaining time t (N);
s) repeating steps n) -r) until the final amount is obtained when the amount filled is less than a predetermined final amount;
13. The method of claim 12, wherein: In operation of the filling system according to steps a) to k) of claim 12 or steps n) to s) of claim 13,
While the transport unit (2) is passing through the weighing section (7 ) of the track (5) , weigh the total mass of the transport unit (2) , the container (1) and the filled substance. Steps,
Calculating the total amount of material present in the container (1) by subtracting a predetermined tare mass of the transport unit (2) and the container (1) from the total mass;
The method that continues.   The ratio of the predetermined amounts A2 and A3 defined as (A3-A2) / A3 is less than 0.25, preferably less than 0.1, more preferably 0.001 and 0.1. 15. A method according to any of claims 12 to 14, which is between. Operation of the filling system, the during transportation unit (2) is in while passing through the weighing section (7) of the track (5), wherein the conveying unit in order to obtain the tare weight of the transport unit (2) ( 16. A method according to any of claims 12 to 15, comprising the preceding step of weighing 2) . The operation of the filling system is between step a) and step b) of claim 12;
A step wherein the transport unit (2) is weighed on the total weight of said conveying unit (2) and the received container (1) while that is being passed through the weighing section (7) of the track (5),
Calculating a potential amount of residual material present in the container (1) by subtracting a predetermined tare mass of the transport unit (2) and the container (1) from the total mass;
17. A method according to any of claims 12 to 16, comprising an intermediate step consisting of:

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